APA
Khera S., . (2006). Ultimate Customer Service. Singapore: Qualified Learning Systems.
Chicago
Khera Shiv, . 2006. Ultimate Customer Service. Singapore: Qualified Learning Systems.
Harvard
Khera S., . (2006). Ultimate Customer Service. Singapore: Qualified Learning Systems.
MLA
Khera Shiv, . Ultimate Customer Service. Singapore: Qualified Learning Systems. 2006.